MAP20200014072 Smith, Andrew Mind your step / Andrew Smith Sumario: The idea of a long-term interest rate is embedded in actuarial thought and practice. While market interest rates fluctuate, we think about long-run averages driven by economic fundamentals. Tasks ranging from budgeting for pension contributions to the ultimate forward rate in Solvency II require assessments of long-run average returns. Estimation of long-run returns involves a mix of judgment and, sometimes, intricate quantitative models. Bayesian statistics gives us a framework for combining these elements: the judgment corresponds to a prior distribution of parameters, while the forecast is based on a posterior parameter distribution given some data En: The Actuary : the magazine of the Institute & Faculty of Actuaries. - London : Redactive Publishing, 2019-. - 01/01/2020 Número 1 - January/February 2020 , p. 28-30 1. Teorema de Bayes . 2. Modelos actuariales . 3. Cálculo actuarial . 4. Tasas de interés . 5. Solvencia II . 6. Estadísticas . I. Título.